Rare earth elements have occupied an important role in marine geochemical research, particularly as used in the format of REE abundance patterns to describe the geochemical pathways in marine sedimentation and authigenesis. This study concentrates on the distribution pattern of Rare earth elements in the sediments, behavior of Eu and Ce with respect to their occurrence in multiple oxidation states. It also concentrate the depth wise variation of sediment REEs from near shore areas (30m) to deeper depths 200m) in the Arabian Sea. It includes the downcore variation of REEs and other trace elements in the sediment cores and a comparison between the REE distributions of Arabian Sea sediment with the sediments of Andaman Sea. The study gives a general introduction regarding the importance of RRE studies, its occurrence and abundance, electronic configuration, lanthanide contraction, oxidations states and REE supply to the ocean, seawater and sediments.

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Joselet Mathew; Dr.Kulasekarapandian, S(Cochin University Of Science And Technology, November 6, 1990)

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Abstract:

This thesis deals with the population characteristics of Artemia
and the effect of different environmental parameters on the different
stages of Artemia in a salina at Tuticorin, south east coast of India.
The present investigation was carried out from 1985 to I987.
The study was initiated by undertaking a survey to find out suitable
Artemia habitats along the south east coast of India and a perennial
salina with an area of 0.25 ha was selected at Karapad (Tuticorin). Weekly
samplings were made for two full calender years (1986-87) to collect
the different stages of Artemia population as well as the different
environmental parameters. The thesis comprises of the following sections: Introduction, materials and methods, systematics, biology and distribution of Artemia, results and discussion, summary and bibliography. The section on results
and discussion gives the characteristics of Artemia population in the
salina, the seasonal variations of different environmental parameters
in the salina and their effects on different stages of Artemia population.
Description of an experiment conducted to show the sudden changes of
salinity on different stages of Artemia is also given as a separate
section.

Description:

Centre Of Advanced Studies In Mariculture,Cochin University Of Science And Technology

The main source of protein for human and animal consumption is from
the agricultural sector, where the production is vulnerable to diseases,
fluctuations in climatic conditions and deteriorating hydrological conditions due
to water pollution. Therefore Single Cell Protein (SCP) production has evolved
as an excellent alternative. Among all sources of microbial protein, yeast has
attained global acceptability and has been preferred for SCP production. The
screening and evaluation of nutritional and other culture variables of
microorganisms are very important in the development of a bioprocess for SCP
production. The application of statistical experimental design in bioprocess
development can result in improved product yields, reduced process variability,
closer confirmation of the output response to target requirements and reduced
development time and overall cost.The present work was undertaken to develop a bioprocess technology for
the mass production of a marine yeast, Candida sp.S27. Yeasts isolated from the
offshore waters of the South west coast of India and maintained in the
Microbiology Laboratory were subjected to various tests for the selection of a
potent strain for biomass production. The selected marine yeast was identified
based on ITS sequencing. Biochemical/nutritional characterization of Candida
sp.S27 was carried out. Using Response Surface Methodology (RSM) the
process parameters (pH, temperature and salinity) were optimized. For mass
production of yeast biomass, a chemically defined medium (Barnett and Ingram,
1955) and a crude medium (Molasses-Yeast extract) were optimized using
RSM. Scale up of biomass production was done in a Bench top Fermenter using
these two optimized media. Comparative efficacy of the defined and crude
media were estimated besides nutritional evaluation of the biomass developed
using these two optimized media.

Description:

Dept. of Marine Biology, Microbiology and
Biochemistry, Cochin University of Science and
Technology,